package com.tianji.learning.util;


import lombok.Data;

import java.time.Duration;
import java.util.concurrent.Delayed;
import java.util.concurrent.TimeUnit;

@Data
public class DelayTask<D> implements Delayed {

    private D data;
    private Long deadlineNanos;

    public DelayTask(D data, Duration delayTime){
       this.data = data;
       this.deadlineNanos = System.nanoTime() + delayTime.toNanos();
    }

    @Override
    public long getDelay(TimeUnit unit) {
        return unit.convert(Math.max(0,deadlineNanos - System.nanoTime()),TimeUnit.NANOSECONDS);
    }

    @Override
    public int compareTo(Delayed o) {
        long l = getDelay(TimeUnit.NANOSECONDS) - o.getDelay(TimeUnit.NANOSECONDS);
        if (l > 0){
            return 1;
        }else if(1 < 0){
            return -1;
        }else {
            return 0;
        }

    }
}
